Download or read book Six Degree of Freedom Optical Sensor for Dynamic Measurement of Linear Axes written by Jeremy John Kroll and published by . This book was released on 2003 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an effort to reduce the error characterization time of linear axes, a six degree of freedom optical sensor has been developed. The sensor consists of a fixed source and a small moving target. The sensor uses a 5 kHz sample rate to allow dynamic, simultaneous measurement of all six degrees of freedom. The moving element is purely optical, scales with beam size and can easily be reduced in size to a 25 mm cube that weighs approximately 50 grams. Using a stabilized helium-neon laser source, the current system has a linear displacement resolution of 153 nm. The straightness resolution, with 0.4 meters between the source and the lateral effect photodiode, is 250 nm. This corresponds to a resolution for pitch and yaw of 1.25 (mu)radians. With the current available laser input power, the theoretical resolution of the roll measurement is 2 (mu)radians. The majority of machine tools and coordinate measuring machines used today consist of stacked linear axes. In order to obtain three dimensional controlled motion, machines typically have three nominally linear axes. To increase the accuracy of these machines, high accuracy characterization tools, such as the one developed in this research, are used to measure errors along the axes of motion. These measured errors are then used to compensate the motion of the machine.
Download or read book Coordinate Measuring Machines and Systems written by Robert J. Hocken and published by CRC Press. This book was released on 2016-04-19 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since John Bosch edited and published the first version of this book in 1995, the world of manufacturing and coordinate measuring machines (CMMs) and coordinate measuring systems (CMSs) has changed considerably. However, the basic physics of the machines has not changed in essence but have become more deeply understood. Completely revised and updat
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Six Degree of Freedom Sensor written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This small, non-contact optical sensor increases the capability and flexibility of computer controlled machines by detecting its relative position to a workpiece in all six degrees of freedom (DOF). At a fraction of the cost, it is over 200 times faster and up to 25 times more accurate than competing 3-DOF sensors. Applications range from flexible manufacturing to a 6-DOF mouse for computers. Until now, highly agile and accurate machines have been limited by their inability to adjust to changes in their tasks. By enabling them to sense all six degrees of position, these machines can now adapt to new and complicated tasks without human intervention or delay--simplifying production, reducing costs, and enhancing the value and capability of flexible manufacturing.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Perception written by Uwe J. Ilg and published by IOS Press. This book was released on 2004 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the 5th workshop on 'Dynamic Perception' which was held on November 18 - 19, 2004, at the Max Planck Institute for Biological Cybernetics in Tübingen. As in the previ-ous meetings, the conference is characterised by its high degree of in-terdisciplinarity. The presentations cover the fields of computer science, psychology, neuroscience as well as biology. The common denominator of all contributions consists in the observation that the sensory systems of man, animals and robots have to solve similar tasks such as goal-directed behaviour, orientation within a 3D world or object identification, to name just a few.
Download or read book Design of Software and Hardware Components for a Six degrees of Freedom Optical Position Sensor written by and published by . This book was released on 1997 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the evaluation of a fully compatible and operational data acquisition system for a six-degrees of freedom optical sensor (SixDOF). The SixDOF, developed at Lawrence Livermore National Laboratory by Charles Vann, is capable of tracking an object's position in all its six degrees of freedom without any datum specification by means of two reflective surfaces mounted on the object. To make the SixDOF operational and thus validate its underlying physics, a signal processing system has been designed so that information from the sensor is transferred accurately and efficiently to a computer. In addition, a six-degrees of freedom positioning stage has been built in efforts to calibrate the sensor in real time. A crucial design constraint is the necessity to build the complete data acquisition system so that it be small and most importantly portable. The prototype of the SixDOF system proved to be capable of crudely detecting changes in the position of an object in all six spatial degrees of freedom. An accuracy of around 0.5 mm is estimated presently even though the position of the two reflectors on the object is seen to significantly influence the accuracy of the sensor. The resolution of the sensor is not quite understood yet because of uncertainties in the actual spot size of the laser, however, field of the view has been seen to increase as the resolution decreases. The decoupling (calibration) of the sensor data proved to be rather successful although some coupling still exists. This coupling, however, is almost certain to come from the crudeness in the alignment of the optics within the sensor.
Download or read book Encyclopedia of Ocean Engineering written by Weicheng Cui and published by Springer Nature. This book was released on 2022-06-29 with total page 2203 pages. Available in PDF, EPUB and Kindle. Book excerpt: This encyclopedia adopts a wider definition for the concept of ocean engineering. Specifically, it includes (1) offshore engineering: fixed and floating offshore oil and gas platforms; pipelines and risers; cables and moorings; buoy technology; foundation engineering; ocean mining; marine and offshore renewable energy; aquaculture engineering; and subsea engineering; (2) naval architecture: ship and special marine vehicle design; intact and damaged stability; technology for energy efficiency and green shipping; ship production technology; decommissioning and recycling; (3) polar and Arctic Engineering: ice mechanics; ice-structure interaction; polar operations; polar design; environmental protection; (4) underwater technologies: AUV/ROV design; AUV/ROV hydrodynamics; maneuvering and control; and underwater-specific communicating and sensing systems for AUV/ROVs. It summarizes the A–Z of the background and application knowledge of ocean engineering for use by ocean scientists and ocean engineers as well as nonspecialists such as engineers and scientists from all disciplines, economists, students, and politicians. Ocean engineering theories, ocean devices and equipment, ocean design and operation technologies are described by international experts, many from industry and each entry offers an introduction and references for further study, making current technology and operating practices available for future generations to learn from. The book also furthers our understanding of the current state of the art, leading to new and more efficient technologies with breakthroughs from new theory and materials. As the land resources approach the exploitation limit, ocean resources are becoming the next choice for the sustainable development. As such, ocean engineering is vital in the 21st century.
Download or read book Topics in Modal Analysis II Volume 6 written by R. Allemang and published by Springer Science & Business Media. This book was released on 2012-04-28 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topics in Modal Analysis II, Volume 6: Proceedings of the 30th IMAC, A Conference and Exposition on Structural Dynamics, 2012, is the sixth volume of six from the Conference and brings together 65 contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on: Aerospace, Acoustics, Energy Harvesting, Shock and Vibration, Finite Element, Structural Health Monitoring, Biodynamics Experimental Techniques, Damage Detection, Rotating Machinery, Sports Equipment Dynamics, Aircraft/Aerospace.
Download or read book Design and Analysis of a Three degree of freedom Optical Sensor for Real time Orientation Measurement written by Debao Zhou and published by . This book was released on 2003 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Volumetric Optical Encoder for the Measurement of a Linear Feed drive Axis written by Ulrich Mueller and published by . This book was released on 2001 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Modeling and Experiments of 3 DOF Electromagnetic Spherical Actuators written by Liang Yan and published by Springer Science & Business Media. This book was released on 2011-06-06 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: A spherical actuator is a novel electric device that can achieve 2/3-DOF rotational motions in a single joint with electric power input. It has advantages such as compact structure, low mass/moment of inertia, fast response and non-singularities within the workspace. It has promising applications in robotics, automobile, manufacturing, medicine and aerospace industry. This is the first monograph that introduces the research on spherical actuators systematically. It broadens the scope of actuators from conventional single-axis to multi-axis, which will help both beginners and researchers to enhance their knowledge on electromagnetic actuators. Generic analytic modeling methods for magnetic field and torque output are developed, which can be applied to the development of other electromagnetic actuators. A parametric design methodology that allows fast analysis and design of spherical actuators for various applications is proposed. A novel non-contact high-precision 3-DOF spherical motion sensing methodology is developed and evaluated with experiments, which shows that it can achieve one order of magnitude higher precision than conventional methods. The technologies of nondimensionalization and normalization are introduced into magnetic field analysis the first time, and a benchmark database is established for the reference of other researches on spherical actuators.
Download or read book Multi degree of Freedom Optical Metrology Techniques written by Xiangzhi Yu and published by . This book was released on 2017 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Precision linear stages provide the basic movement for many nanotechnology systems such as lithography stages, biological scanning systems, and nanofabrication positioning systems. All these systems require precise position sensing for feedback control and extensive calibration procedures to achieve the required accuracy. This thesis begins with proposing and experimentally validating an analytical model for analyzing beam geometry, system alignment, and wavefront aberration effects on using a Differential Wavefront Sensing technique, which serves as the working principle for the simultaneous measurement of displacement, pitch, and yaw. Afterward, a compact state-of-the-art six degree-of-freedom optical metrology system is presented which enables fast, accurate calibration and error mapping of all the geometric errors simultaneously. In addition, the proposed system can significantly mitigate the temporal, dynamic, location, and Abbe errors during the calibration process. The working principle for each degree-of-freedom measurement is presented and system-level integration is investigated to evaluate the overall performance. Lastly, a refractometer based on variable length vacuum cell which enables both absolute refractive index of air sensing and tracking is presented. The proposed system can achieve low measurement uncertainty and high bandwidth, which is suitable for real-time compensation of ultra-precision interferometry measurements under atmospheric conditions."--Abstract.
Download or read book Journal of Dynamic Systems Measurement and Control written by and published by . This book was released on 2005 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of Software and Hardware Components for a Six degrees of Freedom Optical Position Sensor written by Fermin Noel Garcia and published by . This book was released on 1997 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Metrology for Precision Engineering written by Wei Gao and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-11-22 with total page 655 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides readers the fundamentals of optical metrology for precision engineering. The next-generation measurement technologies based on ultrashort pulse laser and optical frequency comb are also presented, making it an essential reference book for various engineering fields. • Introduces fundamental theories and techniques • Combines theories with practical applications • Presents technologies in an easy-to-understand way
Download or read book Large Space Structures Systems in the Space Station Era written by and published by . This book was released on 1991 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
